001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.component.dataset;
018
019import java.io.BufferedReader;
020import java.io.File;
021import java.io.FileReader;
022import java.io.IOException;
023import java.util.LinkedList;
024import java.util.List;
025import java.util.Scanner;
026
027/**
028 * A DataSet that reads payloads from a file that are used to create each message exchange
029 * along with using a pluggable transformer to customize the messages.  The file contents may optionally
030 * be split using a supplied token.
031 *
032 * @version
033 */
034public class FileDataSet extends ListDataSet {
035    private File sourceFile;
036    private String delimiter = "\\z";
037
038    private List<Object> defaultBodies;
039
040    public FileDataSet(String sourceFileName) throws IOException {
041        this(new File(sourceFileName));
042    }
043
044    public FileDataSet(File sourceFile) throws IOException {
045        this(sourceFile, "\\z");
046    }
047
048    public FileDataSet(String sourceFileName, String delimiter) throws IOException {
049        this(new File(sourceFileName), delimiter);
050    }
051
052    public FileDataSet(File sourceFile, String delimiter) throws IOException {
053        setSourceFile(sourceFile, delimiter);
054    }
055
056    // Properties
057    //-------------------------------------------------------------------------
058
059    public File getSourceFile() {
060        return sourceFile;
061    }
062
063    public void setSourceFile(File sourceFile) throws IOException {
064        this.sourceFile = sourceFile;
065        readSourceFile();
066    }
067
068    public void setSourceFile(File sourceFile, String delimiter) throws IOException {
069        this.sourceFile = sourceFile;
070        this.delimiter = delimiter;
071        readSourceFile();
072    }
073
074    public String getDelimiter() {
075        return delimiter;
076    }
077
078    // Implementation methods
079    //-------------------------------------------------------------------------
080
081    private void readSourceFile() throws IOException {
082        List<Object> bodies = new LinkedList<>();
083        try (BufferedReader br = new BufferedReader(new FileReader(sourceFile))) {
084            Scanner scanner = new Scanner(br);
085            scanner.useDelimiter(delimiter);
086            while (scanner.hasNext()) {
087                String nextPayload = scanner.next();
088                if ((nextPayload != null)  &&  (nextPayload.length() > 0)) {
089                    bodies.add(nextPayload);
090                }
091            }
092            setDefaultBodies(bodies);
093        }
094    }
095}